Furnace-door opener.



E. N. MUMME Y & G. H. FISHER.

FURNACE DOOR OPENER.

APPLICATION FILED AUG. 30, 1904.

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UNTTED STATES Patented January 3, 1905.

PATENT Orricn.

EVERETT N. MUMHEY AND CHESTER H. FISHER, OF 8010, OHIO.

FURNACE-DOOR OPENER.

SPECIFICATION forming part of Letters Patent N0. 779,128, dated January3, 1905.

Application filed August 30, 1904. Serial No. 222,763.

To all whom it may concern:

Be it known that we, EVERETT N. MUMMEY and OHns'rnR H. Frsrrumcitizensof the United States, residing at Scio, in the county of Harrison andState of Ohio, have invented certain new and useful Improvements inFurnace- Door Openers, of which the following is a specification.

This invention provides a novel operating inlechanism for openingfurnace-doors and the In carrying out the invention the door is operableby means of a foot-lever and normally remains closed by reason of itsweight, the foregoing structure admitting of actuation of the door bythe fireman without removing his hands from the shovel, and this isadvantageous in that the door may be quickly opened and closed as eachshovelful of coal is thrown into the furnace, a comparatively smallamount of cold air being admitted, and the flues and crown-sheet arethus not allowed to cool, accomplishing a saving of coal in an obviousmanner.

The invention resides particularly in the peculiar mounting of the doorand the arrangement and structure of the operating parts, whereby thesame may be readily reversed so as to be convenient for operation by aright or left hand operator.

For a full description of the invention and the merits thereof, and alsoto acquire a knowledge of the details of construction of the means foreffecting the result, reference is to be had to the followingdescription and accompanying drawings.

While the essential and characteristic fea tures of the invention aresusceptible of modification. still the preferred embodiment of theinvention is illustrated in the accompanying drawings, in which- Figure1 is a perspective view showing the embodiment of the invention. Fig. 2is a horizontal sectional view. Fig. 3 is a vertical sectional view.Fig. 4: is a detail view of the frame-plate secured to the furnace andagainst which the door operates.

Corresponding and like parts are referred to in the followingdescription and indicated able substantial manner. The door 2 is limitedin its downward movement by means of pins 4:, which project from thefurnace adjacent and between the lower extremities of the guides 3. Thepins 4 serve as rests for the door 2 when the latter is closed, properlysupporting said door in such position. A bracket 5 projects from thefurnace at one side of one of the guides 3 and at the upper portionthereof, and this bracket supports a lever 6. pivoted thereto at a pointbetween its ends. One end of the lever 6 is connected with the door 2 bymeans of a link 7 said link being provided at its upper portion with aswiveled loop 8, a pivot-pin 9 passing through the loop 8 and anadjacent end of the lever 6. A connecting-bar 10 is connected with thelever 6 upon one side of its fulcrum, and this bar 10 is also connectedwith a foot-lever 11, pivoted to the transverse bar 12, the latter beingjournaled in suitable bars (shown at 13) and located some distancebeneath the furnacedoor 2. The bar 12 extends some distance beyond thespaced guides 3, and the foot-lever11 is adjustable transversely of thebar 12, being fixed at an ascertained adjustment by means of a set-screw13.

A turnbuckle 14: is interposed in the length of the rod 10 and admits alengthening and shortening of this rod to nicely adjust the position ofthe furnace-door in the practical use of the invention. When it isdesired to clean since the lever 6 may be readily turned so as to assumea position in which the same is properly pivoted upon the bracket 9 whenthe latter is mounted at either side of said door 2. It will also benoted that the form of the link member 7 facilitates a free movement ofthe door 2 in its guides and prevents binding action of the same as itis opened and closed. A weight may be carried by the end of the lever 6opposite that connected with the door, said Weight being used forobvious purposes.

The parts of the invention are very simple in structure and may be verycheaply applied to various types of furnace-door constructions atpresent in use.

Having thus described the invention, what is claimed as new is In afurnace-door opener, the combination of a vertically-movable door, alever pivoted between its ends adjacent the upper portion of the door, afoot-lever, a rod connecting the foot-lever and the first-mentionedlever, a turnbuckle in the length of said rod, a link connecting thefirst-mentioned lever and the door, said link being provided with aswivelloop directly connected with the first-mentioned lever, a barjournaled transversely of the door and arranged below the same, said barsupporting the foot-lever, and a set-screw for adjusting the foot-levertransversely of the said bar.

In testimony whereof we afiix our signatures in presence of twowitnesses.

EVERETT N. MUMMEY. [L. s.] CHESTER H. FISHER. [L. s.] Witnesses:

G. D. CUSTER, R. R. MORTLAND.

